Agree with Spitfire that NAC or any other US flight school will be able to answer most of the above for you.
As I have been to the US myself and flown 100 hours plus am planning on going back for some more in Sept you may want to consider the following:-
- why start off in Florida again? In Sept I am going to the West Coast to enjoy some "hot and high flying"
- irrespective of whether you go to Florida or somewhere else in the States do lots of research on prices. You will get cheaper rates if you hunt around. Just make sure that you know what type of aircraft and fit you are getting for your buck
- do a search of the private flying forums, as there are loads of threads about proposed routes throughout the States taking in some of the best sights, also loads of recommended places to rent
- be sure to understand what the fuel reimbursement policy is as prices vary widely.
Have fun. PM me if you want some more advice.